| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rare earth permanent magnet which can minimize a reduction in the volume of an R-M-B based sintered magnet (R being one, two or more selected from rare earth elements including Y and Sc, M being Fe or a transition metal containing Fe and Co as its main components), and can effectively reduce an eddy current by forming a slit in the magnet, and also to provide a method of manufacturing the permanent magnet and a rotating machine. <P>SOLUTION: The rare earth permanent magnet comprises a sintered joint obtained by integrally joining a plurality of single magnets made of an R<SP>1</SP>-M-B based composition (R<SP>1</SP>being one, two or more selected from rare earth elements including Y and Sc, M being Fe or a transition metal containing Fe and Co as its main components). The sintered joint has a slit passed therethrough from its one surface to another surface. An R<SP>2</SP>oxide layer (R<SP>2</SP>being one, two or more selected from rare earth elements including Y and Sc) is formed on the respective surfaces of the slit. <P>COPYRIGHT: (C)2008,JPO&INPIT |
